Wien's displacement law states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature.
It has a tropical wet and dry climate
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Answer:
<h2> Conventional rainfall occurs when the energy</h2><h2> of the sun's heats the surface of the earth</h2><h2> , causing water to evaporation </h2><h2> to from water vapour, when when the lands heats up, it warms the air above it.this causes the air to expand and rice.</h2>
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Answer:
no. of protons = 39
atomic number = number of protons = 39
number of neutrons = 51
element is Yttrium
Explanation:
given data:
number of electron is 39
mass of atom is 90
We know that atoms are neutral because +ve charged protons is equal to no of -ve charged electrons.
we know that:
atomic number is equal to number of protons,
and atomic mass is the summation of no. of protons and no. of neutrons
number of protons = number of electrons
from the data given:
a) No. of protons = 39 (since number of electrons = protons)
b) atomic number = number of protons = 39
c) number of neutrons = atomic mass - atomic number
= 90 - 39
= 51
d) element is Yttrium
